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underground storage tank and accessory pump unit . The ED <br /> does not be ieve that suffic4.en- data e:-.-f to make a ''fro <br /> contamination'' finding . <br /> In order to accomplish these tasks , AHD a? iieves that ll;e <br /> local direction of flow of the water J.- the aquifers should <br /> be determined . The only sure way to do this is to measure <br /> precisely the standing fluid Teti _ l in t—hree or more nearby <br /> locations and to calculate the slope of the water table . <br /> Fiaures 1 , 2 and 3 show the slope of the u-nderground water <br /> table on a regional basis ; however, the as <br /> complete in the local area as on mos; of the map . T.Ze E'HD <br /> has required that this water table slope be determined . They <br /> have also required that the water in the on site water well <br /> be tested for contaminates and that its level be determined . <br /> If one knew that the water in +his well weYe i.. cortin ii- :s <br /> hydraulic contact with that wilicri will be III o�ind in <br /> monitoring wells , then only two moniL.orin riee: -13 would <br /> needed to determine the water t=ile s i op'V se this <br /> can be determnined with 3 P.oil-0:3 . inasmuch as _. LS n^ <br /> known, t- is report recommends that three monitoring wells be <br /> drilled as shown on Figure 4 . Well 11°10 . 1 i, located. in a <br /> down-slope :cater flaw direc='ion as deduced fro,T the County <br /> maps and adjacent to Airport Way . We ! ! No . 2 will be <br /> located within 10 ' of the end of the 41-o%1; excavation, in .a <br /> position where aray leakage would li'Kely be discovered . We . .. <br /> No . 3 will be located adjace=nt -_o Airport hay in a soi.,_therly <br /> direction; which possibly also co41ld be the direction of <br /> water flow . I f , upon testing the wa-!:er level iI, the current <br /> water well , i.- is found treat the level obtained fits t o <br /> pattern of the three monitori:'.g well: , then this data will <br /> also be utilitied in deter-mining the water t3Li > _ lope . <br /> Proposed Field Work <br /> Figure 5 is a type diagram for the proposed monitoring <br /> wells . Exact depths for each of the opera ions s1O::rn wig _ <br /> not be known until the bore holes are :frilled . <br /> A portable , truck mounted, hullo., stem, augei drilling unit <br /> willbe used . A 7" nominal size G . D . hole will be xiore-' <br /> an estimated 30 ' below ground level or whatever dept: is <br /> needed to penetrate the water table at least 50 aallon <br /> drums with sealing covers will be on site for collectioll of <br /> all auger cuttings and any water bailed from the wells . i1'-e <br /> cuttings and any water collected will be disposed of in a <br /> proper manner after -tree operatics is concluded, the disposal <br /> methods will be depe 'ent a; cn iFve _s p. l iutants found . <br /> d <br /> bottom 10 ' plus pre per foratad with . 02" C w Vt� . Lf ail'_ Sn�.I✓�t.. <br /> on bottam. Tal& well bore around the per f'orated interval will <br /> he packed with # 3 said ..a t—Ile equivalent _=3 w I :. _tea- <br /> medium . -4 bentonite : �_, _ _ :g wi 11 k:e placed above t Y <br /> per fcrat. ; n the pike-bu: _h.ol ., an::uius , to _,. _ as 1 <br />